Lamp bulb



FIG. 1 is a front elevational view of a lamp bulb showing our new design, the rear elevational view being a mirror image of the front view shown;

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image of the side view shown;

FIG. 3 is an enlarged sectional view taken along line A—A in FIG. 1; and,

FIG. 4 is front elevational view thereof shown when in use with an outer bulb.

The outer bulb and electrical connectors shown in FIG. 4 are shown for illustrative purposes and form no part of the claimed design. 

The ornamental design for a lamp bulb, as shown and described. 